Origin of giant magnetoresistance in conventional AlNiCo5 magnets

Hütten A, Reiss G, Saikaly W, Thomas G (2001)
ACTA MATERIALIA 49(5): 827-835.

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Abstract
Structure-property relationships in AlNiCo5 permanent magnets in the optimum magnetic state have been investigated so as to uncover the origin of giant magnetoresistance (GMR). According to analytical field ion and conventional transmission electron microscopy, AlNiCo5 consists of two coherent B2-ordered phases. One, alpha (1), corresponds to Fe7Co3 and the other, alpha (2), to Al1.1Ni0.9 with some substitution of Al, Ni, Cn and Fe, Co, Cu, respectively. Seventy percent of the GMR-effect can be attributed to superparamagnetic clusters, about 1 nm in size, positioned on the Al-rich alpha (2)-sublattice. The remaining 30% result from 3-6 nm superparamagnetic alpha (1)-clusters in the form of fine bridges interconnecting large alpha (1)-particles normal to, or inclined to their direction of elongation. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
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Hütten A, Reiss G, Saikaly W, Thomas G. Origin of giant magnetoresistance in conventional AlNiCo5 magnets. ACTA MATERIALIA. 2001;49(5):827-835.
Hütten, A., Reiss, G., Saikaly, W., & Thomas, G. (2001). Origin of giant magnetoresistance in conventional AlNiCo5 magnets. ACTA MATERIALIA, 49(5), 827-835.
Hütten, A., Reiss, G., Saikaly, W., and Thomas, G. (2001). Origin of giant magnetoresistance in conventional AlNiCo5 magnets. ACTA MATERIALIA 49, 827-835.
Hütten, A., et al., 2001. Origin of giant magnetoresistance in conventional AlNiCo5 magnets. ACTA MATERIALIA, 49(5), p 827-835.
A. Hütten, et al., “Origin of giant magnetoresistance in conventional AlNiCo5 magnets”, ACTA MATERIALIA, vol. 49, 2001, pp. 827-835.
Hütten, A., Reiss, G., Saikaly, W., Thomas, G.: Origin of giant magnetoresistance in conventional AlNiCo5 magnets. ACTA MATERIALIA. 49, 827-835 (2001).
Hütten, Andreas, Reiss, Günter, Saikaly, W, and Thomas, G. “Origin of giant magnetoresistance in conventional AlNiCo5 magnets”. ACTA MATERIALIA 49.5 (2001): 827-835.
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